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Finding the Fourth Proportional to 348.74, 522.95 and 105.22

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Solution

The fourth proportional to 348.74, 522.95 and 105.22 is: 157.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.74 : 522.95 = 105.22 : x
  2. Step 2: Convert to fraction form
    348.74/522.95 = 105.22/x
  3. Step 3: Cross multiply
    348.74x = 522.95 × 105.22
  4. Step 4: Simplify right side
    348.74x = 55,024.80
  5. Step 5: Solve for x
    x = 55,024.80/348.74
  6. Step 6: Final answer
    x = 157.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.